package main.visitor;

public class Main {

    public static void main(String[] args) {
	
	Visitor postageVisitor = new PostageVisitor();
	Visitor expressVisitor = new ExpressVisitor();
	
	Book book = new Book();	
	System.out.println(book.accept(postageVisitor));
	System.out.println(book.accept(expressVisitor));
    }
}
